tailieunhanh - Project Planning Control 4 Episode 5

Tham khảo tài liệu 'project planning control 4 episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Float 8 Pour foundations 2 Figure in that string up to the previous node at which more than one activity meet. In other words set pumps Figure has a float of 30 - 26 4 days as have all the activities preceding it except deliver pump which has an additional 24 - 20 4 days float. Connect 33 pipe 3 10 24 Set 26 Figure If for example the electrical engineer requires to know for how long he can delay the cabling because of an emergency situation on another part of the site without delaying the project he can find the answer right away. The float is 33-28 5 days. If the labour he needs for the emergency can be drawn from the gang erecting the starters he can gain another 28-23 5 days. This gives him a total of 10 days grace to start the starter installation without affecting the total project time. A few practice runs with small networks will soon emphasize the simplicity and speed of this method. We have in fact only dealt in this exposition with small - indeed tiny - networks. How about large ones It would appear that this is where the computer is essential but in fact a well-drawn network can be analysed manually just as easily whether it is large or small. Provided the very simple base rules are adhered to a very fast forward pass can be inserted. The float of any string can then be seen by inspection . by simply subtracting the lower node number from the higher number of the node which forms the termination point of the string in question. This point can best be 99 Project Planning and Control illustrated by the example given in Figure . For simplicity the activities have been given letters instead of names since the importance lies in understanding the principle and the use of letters helps to identify the string of activities. In this example there are 50 activities. Normally a practical network should have between 200 and 300 activities maximum . four to six times the number of activities shown but this does not pose any greater problem.